qrm2/exts/morse.py

"""
Morse Code extension for qrm
---
Copyright (C) 2019 Abigail Gold, 0x5c

This file is part of discord-qrmbot and is released under the terms of the GNU
General Public License, version 2.
"""

import json
from datetime import datetime

import discord
import discord.ext.commands as commands

import common as cmn


class MorseCog(commands.Cog):
    def __init__(self, bot: commands.Bot):
        self.bot = bot
        with open('resources/morse.json') as morse_file:
            self.ascii2morse = json.load(morse_file)
            self.morse2ascii = {v: k for k, v in self.ascii2morse.items()}

    @commands.command(name="morse", aliases=['cw'], category=cmn.cat.ref)
    async def _morse(self, ctx: commands.Context, *, msg: str):
        """Converts ASCII to international morse code."""
        with ctx.typing():
            result = ''
            for char in msg.upper():
                try:
                    result += self.ascii2morse[char]
                except KeyError:
                    result += '<?>'
                result += ' '
            embed = discord.Embed(title=f'Morse Code for {msg}',
                                  description=result,
                                  colour=cmn.colours.good,
                                  timestamp=datetime.utcnow())
            embed.set_footer(text=ctx.author.name,
                             icon_url=str(ctx.author.avatar_url))
        await ctx.send(embed=embed)

    @commands.command(name="unmorse", aliases=['demorse', 'uncw', 'decw'], category=cmn.cat.ref)
    async def _unmorse(self, ctx: commands.Context, *, msg: str):
        '''Converts international morse code to ASCII.'''
        with ctx.typing():
            result = ''
            msg0 = msg
            msg = msg.split('/')
            msg = [m.split() for m in msg]
            for word in msg:
                for char in word:
                    try:
                        result += self.morse2ascii[char]
                    except KeyError:
                        result += '<?>'
                result += ' '
            embed = discord.Embed(title=f'ASCII for {msg0}',
                                  description=result,
                                  colour=cmn.colours.good,
                                  timestamp=datetime.utcnow())
            embed.set_footer(text=ctx.author.name,
                             icon_url=str(ctx.author.avatar_url))
        await ctx.send(embed=embed)

    @commands.command(name="cwweight", aliases=["weight", 'cww'], category=cmn.cat.ref)
    async def _weight(self, ctx: commands.Context, *, msg: str):
        '''Calculates the CW Weight of a callsign or message.'''
        with ctx.typing():
            msg = msg.upper()
            weight = 0
            for char in msg:
                try:
                    cw_char = self.ascii2morse[char].replace('-', '==')
                    weight += len(cw_char) * 2 + 2
                except KeyError:
                    res = f'Unknown character {char} in callsign'
                    await ctx.send(res)
                    return
            res = f'The CW weight is **{weight}**'
            embed = discord.Embed(title=f'CW Weight of {msg}',
                                  description=res,
                                  colour=cmn.colours.good,
                                  timestamp=datetime.utcnow())
            embed.set_footer(text=ctx.author.name,
                             icon_url=str(ctx.author.avatar_url))
        await ctx.send(embed=embed)


def setup(bot: commands.Bot):
    bot.add_cog(MorseCog(bot))